Run results for: Number constructor vs unary plus vs parseInt

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser: Chrome 120

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
✓ Unary + (with NaN)	1,043,805,248 Ops/sec
Number (with NaN)	18,414,456 Ops/sec
parseInt (with NaN)	18,365,136 Ops/sec
Unary + (with float)	16,946,990 Ops/sec
Number (with float)	8,826,579 Ops/sec
Unary + (with integer)	8,795,201 Ops/sec
parseInt (with float)	8,654,773 Ops/sec
Unary + (with string integer)	8,420,473 Ops/sec
Number (with integer)	5,961,756 Ops/sec
parseInt (with integer)	5,912,752 Ops/sec
parseInt (with string integer)	5,793,470 Ops/sec
Number (with string integer)	5,760,870 Ops/sec
Unary + (with string float)	4,456,382 Ops/sec
parseInt (with string float)	4,354,956 Ops/sec
Number (with string float)	3,575,084 Ops/sec

Test name

Executions per second

✓ Unary + (with NaN)

1,043,805,248 Ops/sec

Number (with NaN)

18,414,456 Ops/sec

parseInt (with NaN)

18,365,136 Ops/sec

Unary + (with float)

16,946,990 Ops/sec

Number (with float)

8,826,579 Ops/sec

Unary + (with integer)

8,795,201 Ops/sec

parseInt (with float)

8,654,773 Ops/sec

Unary + (with string integer)

8,420,473 Ops/sec

Number (with integer)

5,961,756 Ops/sec

parseInt (with integer)

5,912,752 Ops/sec

parseInt (with string integer)

5,793,470 Ops/sec

Number (with string integer)

5,760,870 Ops/sec

Unary + (with string float)

4,456,382 Ops/sec

parseInt (with string float)

4,354,956 Ops/sec

Number (with string float)

3,575,084 Ops/sec

Tests:

Number (with string integer)
var numberStrInt = Number(Math.floor(1000 * Math.random()).toString());
Unary + (with string integer)
var unaryStrInt = +Math.floor(1000 * Math.random()).toString();
parseInt (with string integer)
var parseStrInt = parseInt(Math.floor(1000 * Math.random()).toString(), 10);
Number (with string float)
var numberStrFloat = Number((1000 * Math.random()).toString());
Unary + (with string float)
var unaryStrFloat = +(1000 * Math.random()).toString();
parseInt (with string float)
var parseStrFloat = parseInt((1000 * Math.random()).toString(), 10);
Number (with integer)
var numberNumInt = Number(Math.floor(1000 * Math.random()));
Unary + (with integer)
var unaryNumInt = +Math.floor(1000 * Math.random());
parseInt (with integer)
var parseNumInt = parseInt(Math.floor(1000 * Math.random()), 10);
Number (with float)
var numberNumFloat = Number(1000 * Math.random());
Unary + (with float)
var unaryNumFloat = +(1000 * Math.random());
parseInt (with float)
var parseNumFloat = parseInt((1000 * Math.random()), 10);
Number (with NaN)
var numberNaN = Number("hello");
Unary + (with NaN)
var unaryNaN = +("hello");
parseInt (with NaN)
var parseNaN = parseInt("hello", 10);